These activities take slightly longer, so are ideal when you have an hour or two, or even a whole afternoon, to dedicate to them.
Mei and her daughter Mischa learn why bubbles are always round and find out how to make giant bubbles with a couple of wooden spoons and some string.
Aoife and her children Lorenzo and Alice become engineers for the day, building structures out of spaghetti and marshmallows, and investigating the properties of materials.
Jackie and her son Alex make a homemade parachute to transport an egg safely to the ground, and explore what it means to do a fair test.
Make an uncooked egg bounce!
Comedian Rufus Hound and his son Alby make soap powered boats and learn how soap affects the way water molecules hold onto each other.
Andy and his nephews make a beautiful colour changing liquid from cabbage juice, and explore the science of indicator solutions.
Catherine and the Lurgan Brownies Group make butter from cream.
Investigate the chemistry of cakes by making microwave mug cakes and seeing what happens when you leave out key ingredients from the recipe.
Baffle your brain with the famous 'hollow mask illusion', and experiment with how it works by making your own.
Experiment with your perception of distance and size by making the amazing Ames room illusion.